chore: update .gitignore with common ignore patterns

- Add environment variable files (.env, .env.local, .env.*.local)
- Add build output directories (dist/, build/)
- Add test coverage directory (coverage/)
- Add IDE workspace files (*.code-workspace)
- Add TypeScript build info files (*.tsbuildinfo, *.tsxbuildinfo)
- Remove docs/* to track documentation files

.gitignore

@@ -14,6 +14,11 @@ stats-*.json
 .wxt
 .vitest
 
+# Environment variables
+.env
+.env.local
+.env.*.local
+
 # Editor directories and files
 .vscode/*
 !.vscode/extensions.json
@@ -30,5 +35,16 @@ stats-*.json
 .qoder/*
 dev/*
 
-docs/*
-!docs/VISUAL_STYLE_GUIDE.md
+# Build outputs
+dist/
+build/
+
+# Test coverage
+coverage/
+
+# IDE files
+*.code-workspace
+
+# Other
+*.tsbuildinfo
+*.tsxbuildinfo